src/third_party/WebKit/Source/modules/indexeddb/DOMWindowIndexedDatabase.cpp

   1 /*
   2  * Copyright (C) 2011, Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are met:
   6  *
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  19  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  20  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
  23  * DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "modules/indexeddb/DOMWindowIndexedDatabase.h"
  28
  29 #include "core/dom/Document.h"
  30 #include "core/frame/LocalDOMWindow.h"
  31 #include "core/page/Page.h"
  32 #include "modules/indexeddb/IDBFactory.h"
  33
  34 namespace blink {
  35
  36 DOMWindowIndexedDatabase::DOMWindowIndexedDatabase(LocalDOMWindow& window)
  37     : DOMWindowProperty(window.frame())
  38     , m_window(window)
  39 {
  40 }
  41
  42 DEFINE_EMPTY_DESTRUCTOR_WILL_BE_REMOVED(DOMWindowIndexedDatabase);
  43
  44 void DOMWindowIndexedDatabase::trace(Visitor* visitor)
  45 {
  46     visitor->trace(m_idbFactory);
  47     WillBeHeapSupplement<LocalDOMWindow>::trace(visitor);
  48     DOMWindowProperty::trace(visitor);
  49 }
  50
  51 const char* DOMWindowIndexedDatabase::supplementName()
  52 {
  53     return "DOMWindowIndexedDatabase";
  54 }
  55
  56 DOMWindowIndexedDatabase& DOMWindowIndexedDatabase::from(LocalDOMWindow& window)
  57 {
  58     DOMWindowIndexedDatabase* supplement = static_cast<DOMWindowIndexedDatabase*>(WillBeHeapSupplement<LocalDOMWindow>::from(window, supplementName()));
  59     if (!supplement) {
  60         supplement = new DOMWindowIndexedDatabase(window);
  61         provideTo(window, supplementName(), adoptPtrWillBeNoop(supplement));
  62     }
  63     return *supplement;
  64 }
  65
  66 void DOMWindowIndexedDatabase::willDestroyGlobalObjectInFrame()
  67 {
  68     m_idbFactory = nullptr;
  69     DOMWindowProperty::willDestroyGlobalObjectInFrame();
  70 }
  71
  72 void DOMWindowIndexedDatabase::willDetachGlobalObjectFromFrame()
  73 {
  74     m_idbFactory = nullptr;
  75     DOMWindowProperty::willDetachGlobalObjectFromFrame();
  76 }
  77
  78 IDBFactory* DOMWindowIndexedDatabase::indexedDB(LocalDOMWindow& window)
  79 {
  80     return from(window).indexedDB();
  81 }
  82
  83 IDBFactory* DOMWindowIndexedDatabase::indexedDB()
  84 {
  85     Document* document = m_window.document();
  86     if (!document)
  87         return 0;
  88
  89     Page* page = document->page();
  90     if (!page)
  91         return 0;
  92
  93     if (!m_window.isCurrentlyDisplayedInFrame())
  94         return 0;
  95
  96     if (!m_idbFactory)
  97         m_idbFactory = IDBFactory::create(IndexedDBClient::create());
  98     return m_idbFactory.get();
  99 }
 100
 101 } // namespace blink